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AN ANALYTICAL INTERACTION RULE FOR CORROSION FLAWS

机译：腐蚀缺陷的分析相互作用规则

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Corrosion is a degradation mechanism that is very common in pipelines and frequently the corrosion flaws develop close one to another. Since a defect causes a perturbation in its neighboring stress field, it is a common procedure to treat close by flaws as a single one, a cluster whose dimensions envelop the whole group of defects, and some criterion must be employed to determine if two flaws are close enough to justify its clustering. The defect interaction rules available at present have practical or experimental foundations and, sometimes, one is substantially different from another. The objective of this article is to present an interaction rule based on analytical solutions for stress and strain around a volumetric flaw in a pressurized thin wall cylinder. The two possible straining modes are identified and how strain and stress propagates from a flaw into the undamaged region of the pipe is solved in the linear elastic domain. Based in this solution, a defect interaction rule is developed. This analytical interaction rule is compared to selected interaction rules commonly employed by the industry nowadays.
机译：腐蚀是一种降解机制，其在管道中非常常见，并且频繁腐蚀缺陷将近距离发展到另一个。由于缺陷导致其相邻的应力场中的扰动，因此将缺陷视为单个缺陷的常见过程，其尺寸包围整组缺陷的群体，并且必须采用一些标准来确定两个缺陷是否有两个缺陷足够接近，以证明其聚类。目前可获得的缺陷交互规则具有实用性或实验基础，有时候，一个与另一个不同。本文的目的是基于对压力薄壁筒中的容积漏洞周围的压力和应变的分析解决方案提出相互作用规则。鉴定了两种可能的应变模式，以及如何从探伤传播到管道的未损坏区域中的应变和应力传播在线性弹性域中。基于该解决方案，开发了缺陷交互规则。将该分析互动规则与现在行业通常雇用的所选交互规则进行比较。

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